void WaitForTime(double nextTime)
{
// check if timestamp is the top of the queue
// if not, wait until the older timestamp is popped by another thread.
std::unique_lock<std::mutex> lock(MUTEX);
CONDVAR.wait( lock, [=]{return NextTime() >= nextTime;});
// TODO: Sleep for appropriate amount of time.
if(REALTIME) {
std::this_thread::sleep_for(std::chrono::milliseconds(1));
}
}
void sig_func(int )
{
// printf("got alarm\n");
NextTime(year,mouth,day,hour,min,second);
alarm(1);
}